Receptacle for receiving a plug connector of a high-voltage cable for a microfocus x-ray tube, plug connection for a high-voltage cable

A receptacle for receiving a high-voltage plug connector (18) of a high-voltage cable (23) for a microfocus X-ray tube with a cathode (24), which has a filament (17) and a grid (27) made of metal,

• wherein the receptacle has a ceramic insulator (1) as insulator,
• wherein the ceramic insulator (1) has a first cavity (2), which is formed at its end near the filament and is crossed by electrical contacts (5) for the filament and the grid (27) as well as electrical conductors (6),
• wherein the ceramic insulator (1) has a second cavity (3), which follows the first cavity (2) at its end remote from the filament, in which spring contacts (7) for supplying current to the filament (17) and a centre pin (8) for supplying voltage to the grid (27) are available for connection to the high-voltage plug connector (18) and the surface of which is covered by a metal layer (9),
• wherein the ceramic insulator (1) has a third cavity (4), which follows the second cavity (3) at its end remote from the filament, and which has a shape to guarantee an accurate fit of the high-voltage plug connector (18) in the inserted state,
• wherein the ceramic insulator (1) has a grid cap (10), which, in the installed state, is conductively connected to the grid (27) of the cathode (24), and the first cavity (2) and the second cavity (3) are surrounded in the radial direction by the grid cap (10), wherein, between grid cap (10) and ceramic body (1), an air gap (12) is formed in the radial direction,
• wherein, at the end of the grid cap (10) remote from the filament, there is a circumferential groove (11) in the axial direction between the grid cap (10) and the ceramic insulator (1).